package io;

import sun.awt.AWTAccessor;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo {
    public static void main(String[] args) throws IOException {
        long start=System.currentTimeMillis();
        System.out.println(start);
        FileInputStream fis=new FileInputStream("abc.jpg");
        FileOutputStream fos=new FileOutputStream("abc.jpg");
        int d;
        while ((d=fis.read())!=-1){
            fos.write(d);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制完毕,耗时"+(end-start)+"ms");
        fis.close();
        fos.close();
        /*
        long start = System.currentTimeMillis();
        System.out.println(start);
        FileInputStream fis = new FileInputStream("abc.jpg");
        FileOutputStream fos = new FileOutputStream("abc.jpg");
        int d;
        while ((d = fis.read()) != -1) {
            fos.write(d);
        }
        System.out.println("复制完毕");
        fis.close();
        fos.close();
        long end = System.currentTimeMillis();
        System.out.println(end);

        System.out.println("耗时"+(end-start));
         */
    }
}
